If your doctor has told you that you need supplemental oxygen at home, your first question is probably a practical one: *Is Medicare going to cover this?* The short answer is yes — Medicare Part B covers home oxygen equipment for patients who qualify. But there's a specific set of criteria you have to meet, a blood test involved, and a rental structure that works differently than most people expect. This guide walks you through all of it. ## What Medicare Actually Covers Medicare Part B classifies home oxygen as durable medical equipment (DME). That means it covers the **rental** of your oxygen equipment — not a purchase. Specifically, Part B will pay for: - **Stationary oxygen concentrators** (HCPCS code E1390) — units that stay in your home and draw oxygen from the surrounding air - **Portable oxygen concentrators** (HCPCS code E0431) — smaller battery-powered units that let you move around - **Liquid oxygen systems** — a home reservoir with a portable refillable unit - **Compressed gas cylinders** — traditional tanks, typically used as backup - All tubing, cannulas, masks, and accessories bundled into the monthly rental payment One thing people don't realize: Medicare's payment is **bundled**. That means the monthly rental fee covers everything — the equipment itself, the oxygen contents, and all supplies. Suppliers cannot bill separately for tubing or cannulas on top of the rental. If a supplier tries to charge you separately for those items, that's a billing error. ## How to Qualify for Medicare Home Oxygen Coverage This is where it gets specific. Medicare doesn't cover oxygen therapy just because a doctor thinks it might help. You have to meet documented medical criteria under CMS National Coverage Determination 240.2 and Local Coverage Determination L33797. Here's what's required: ### Step 1: A Qualifying Diagnosis You need a documented severe lung disease or a condition causing hypoxia-related symptoms that oxygen therapy is expected to improve. Common qualifying diagnoses include: - Chronic obstructive pulmonary disease (COPD) - Emphysema - Pulmonary fibrosis - Diffuse interstitial lung disease - Cystic fibrosis - Bronchiectasis - Congestive heart failure (in certain cases) - Cor pulmonale ### Step 2: A Face-to-Face Visit Your prescribing physician must have conducted a face-to-face evaluation **within 30 days before** the Certificate of Medical Necessity (CMN) date. This visit must be documented — templates alone aren't acceptable. The physician also needs to be enrolled in Medicare (PECOS). > **New in 2026:** CMS added eight additional HCPCS oxygen-related codes to the Required Face-to-Face and Written Order Prior to Delivery (F2F/WOPD) list, effective April 13, 2026. This means more oxygen equipment types now require in-person evaluation and a written order before the equipment can be delivered. ### Step 3: A Qualifying Blood Oxygen Test This is the central requirement. Your doctor orders a blood oxygen test — either an **arterial blood gas (ABG) test** or a **pulse oximetry test** — to measure how much oxygen is in your blood. The test must be performed in-person by a qualified provider while you're in a **chronic stable state** (not during an acute flare-up). Medicare groups the results into coverage tiers: **Group I (straightforward coverage):** - Arterial PO₂ at or below **55 mm Hg**, OR - Oxygen saturation at or below **88%** - Tested at rest, awake, breathing room air **Group II (borderline — requires additional documentation):** - Arterial PO₂ of **56–59 mm Hg**, OR oxygen saturation of **89%** - PLUS at least one of the following: dependent edema suggesting congestive heart failure; pulmonary hypertension or cor pulmonale; or erythrocythemia (hematocrit > 56%) **Group III (less common):** - No hypoxemia meeting Groups I or II, but a documented medical condition proven in peer-reviewed literature to respond to oxygen therapy (e.g., cluster headaches) If you only qualify based on nocturnal (sleep) testing, Medicare will cover stationary oxygen — but **not** a portable unit. ## What You'll Pay in 2026 Medicare Part B pays **80% of the approved amount** after you've met the annual Part B deductible. In 2026, that deductible is **$283**. - You pay $283 first (your deductible) - After that, Medicare covers 80%; you cover 20% - If the monthly rental is $150/month, your share is approximately $30/month If you have a Medicare Supplement (Medigap) plan, it may cover all or most of that 20% coinsurance. ## The 36-Month Rental Cap — and What Happens After Medicare pays for home oxygen equipment rental for a **capped 36 months**. After those 36 months, your **supplier is required to continue providing the equipment and maintenance at no cost to you for an additional 24 months** (total of 5 years). Recertification is required — typically at 3 months or 12 months after initial certification. Your physician needs to confirm continued medical necessity. ## Common Reasons Medicare Denies Home Oxygen Claims 1. **Insufficient documentation** — Accounts for ~60% of improper payments per CMS 2024 audit data. 2. **Test not performed in a chronic stable state** — Testing during hospitalization or acute exacerbation may not count. 3. **Test performed remotely** — Home oximetry tests (except overnight oximetry) don't qualify. 4. **No face-to-face visit** — Prescribing physician didn't see you within the required 30-day window. 5. **Portable oxygen denied** — Qualifying test only performed during sleep. ## Types of Home Oxygen Equipment: Which One Is Right for You? | Equipment Type | Best For | Notes | |---|---|---| | Stationary concentrator | Mostly homebound patients | Plugs into wall; no tanks to refill | | Portable concentrator (POC) | Active patients who leave home | Battery-powered; lightest option | | Liquid oxygen | High-flow needs + active lifestyle | Can fill portable unit from home reservoir | | Compressed gas tanks | Backup / short-term use | Require refill or exchange deliveries | ## How to Find a Medicare-Approved Home Oxygen Supplier Near You Your DME supplier must accept Medicare assignment. When evaluating suppliers, ask: - Do you accept Medicare assignment? - How quickly can you deliver and set up equipment after I receive my prescription? - What's your response time for equipment malfunctions? - Do you provide in-home education on how to use the equipment? **Search for Medicare-approved home oxygen providers near you on DMEHelper.** ## FAQ **Does Medicare cover portable oxygen concentrators?** Yes, if you qualify for home oxygen therapy and your doctor documents that you're mobile within the home. The qualifying blood test must be performed at rest or during exercise — not only during sleep. **How long does Medicare pay for home oxygen?** Medicare pays the monthly rental for 36 months. After that, your supplier must maintain and service the equipment for an additional 24 months at no charge to you. **What is the Part B deductible for oxygen in 2026?** The 2026 Medicare Part B deductible is $283. After meeting it, Medicare covers 80% and you pay 20% of the approved amount. **Does Medicare cover oxygen supplies like tubing and masks?** Yes — all supplies are bundled into the monthly rental payment. You should not receive a separate bill for these items. **Can I qualify for home oxygen if I only need it at night?** Yes. If overnight testing shows oxygen saturation drops to 88% or below during sleep (not solely due to untreated sleep apnea), you may qualify — typically stationary equipment only. **What if Medicare denies my oxygen claim?** File a redetermination request (Level 1 appeal) with your DME MAC within 120 days of the denial notice. --- *Jordan Soblick has 18+ years of experience in Medicare DME operations and is a two-time patent holder in sleep diagnostics.*